The district includes the Regional County Municipalities of Témiscamingue, Abitibi, Abitibi-Ouest, the city of Rouyn-Noranda and a small section of south western Jamésie territory.

The neighbouring ridings are Abitibi—Baie-James—Nunavik—Eeyou, Pontiac, Renfrew—Nipissing—Pembroke, Nipissing—Timiskaming, and Timmins-James Bay.

According to the 2021 Canadian census[3] Ethnic groups: 92.8% White, 5.4% Indigenous Languages: 94.0% French, 3.5% English Religions: 72.4% Christian (66.9% Catholic, 5.5% Other), 26.7% None Median income: $42,000 (2020) Average income: $50,680 (2020) Témiscamingue was created in 1968 from parts of Pontiac—Témiscamingue and Villeneuve.

The riding lost a small territory to Abitibi—Baie-James—Nunavik—Eeyou as a result of the 2012 electoral redistribution.

This riding has elected the following members of the House of Commons of Canada: By-election: On Mr. Brien's resignation, 14 March 2003: By-election: On Mr. Réal Caouette's death, 16 December 1976